(Answered) In a random sample of 20 people the mean commute time to

Engineering

In a random sample of 20 ?people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a? t-distribution to construct a 90?% confidence interval for the population mean μ. What is the margin of error of μ?? Interpret the results.

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